Controlling device for compressors.



R. CUNRADER. CONTROLLINGDEVIGB PQR boMPREssoRs. APPLICATION FILED Q01'. 26, 1910.

Patented Sept. 9, 1913.

5 SHEETS-SHEET 1.

1.9 3" FEh.

H'ozum l R. GONRADER. GONTROLLING DEVICE FOR COMPRBSSQRS.

APPLICATION FILED OOT 26, 1910. Patented Sept. 9, 1913 GQNTROLLNG DEVICE FOR COMPRBSSORS.

APPLICATION FILED 00T. 26, 1910.

.Paien 11 1111.9, 1913.

5 SHEETS-SHEET a.

@vwl/www y 1 I 77M ff- 1 R. GNRADER'.

' vGOII'IROLLING: DEVICE FOR GOMPRESSORS.

I APPLIOATION FILED 00T. 26, 1910.

1,072,576. Y. Patented sept. 9,1913

5 SHEETS-SHEET 4.

\ Urr',

R. GONRADER, GDNTROLLING DEVICE FORLUOMPRESSORS.

"i APPLICATION FILED 00T. 251910. 19?995?, Patented Sept. 9, 193.

5 SHEETS-SHEET 5.

j @l Hof/111213 entre Y' improvements in the construction thereof as will nor valve-is of the sliding valve type, and

a citizen of the United States,

yful Improvements `inControlling Devices srrnrne rnrnnr orrron. l

CONTROLLING DEVICE OR GOMPRESSORS.

Specification of Letters Patent. Application lcd October 26, 191D. Serial No. 589,228.

To all 1li/0m may concern.'

Be it known' that I, RUnonrH CoNRAnnm residing at of Erie and State of have invented new and usenor is fixed on the opposite endV of the shaft from the pulley' 14.

k'i7 have their ends arranged between the ears ,18 in the carrie-r 16, mounted thereonby means ofthe pins" y'19.y The centripetal springs 20 extend 'from `the pins 21 on the carrier to'the pins 22 on the ends of the Weight.

Erie, in the count f- Pennsylvania,

for Compressors, of which the ollowingis a specification.

' This invention vrelates: to controlling devices for compressors, and consists'in certain springs extend, and the shanksnof. the Weights have the openings 17a through which the springs extend. The governor herein described be hereinafter 'jfully described and pointed out in the claims. v

The invention eomprises a centrifugal governor with imprm'einentsv within; the governor itself, and controllingmechanism operatina iipon'the relief deviceof the conpresserA 4together with the pressure device act-ing upon the `governor valve. i

Theinvention is illustrated in the aooonr' panyingdrawings as follows:

Figure 1 shovvs'a vertical central sectiony upon the line 141 in Figs. v2, 5 and 8. ig. 2 shows a side elevation partly in 'section on the lines 2-2 in Figs. 1 and 5. Fig. 3 is a section on the lines S--Bn Figs. 1 and 5. Fig. 4 is a section on vthe lines 4-#4 in Figs. 1 and 5. Fig. 5 is plan View of the. governor. Fig. 6 is a planvievv vor' the rosleeve foreonvying the movement ot' the centrifugal governor. Fig. 7 isr an axially movingsleeve forming a part 'of the saine eonneetion. Fig. 8 shows a -detailed view of the centrifugal weights and their Connections, the saine-'being ijn section on the'li'neIS-fS in Fig. 1. Fig. 9 is a side elevation partly in section 'of acoxnpressor showing the different connections and relief device.

1 marks the phragin, 3 the suticiently from this to preventracing. centripetal force of the springs 20 is suy pleniented: through the `connected mechanisrn ofthe governor. Links 24ore :pins 25 and by pins 26 to the ears 27 on lthe rotative cam sleeve '28.` They caniA sleeve 28 is journaledon the bearingv12, calnsurfaces 29 l is also -niounted on the bearing 12 fa'ndfis lockled against rot-ativevmoveinent relatively to t i the slot 34 in the cover plate 35 ofthe governor carrier 16. The roller is secured in place by the screw 3 3. A collar 3Q journaled on theextension 37 on the cam sleeve 31.' `The extension 37 is of diameter than the cam sleeve 31, forming a@ shoulder 3S., The roller bearing 39 isinterposed between the shoulder and `thefeolla'r. 36. The extension 37 is screw threaded at 4Q. andthe nut. t1-'is arranged on this screw thread and looks the collar Pins-42- are arranged at the collar 36, .throatl of the bell crank ',pins. Thebell on a pin 46, the pin being slipported by .the ears 46a r The'lever y 46h-in the frame with.A throat/e governor body, 24 the diagovernor valve. The goveroppositesides of is opened and closed axial. move-y ment of the valve. A cap 'iis arranged-on. Athe valve'bodyand has the gland 5 which thevalve stem 6 extends. 'Extending .10 into which 'titel` rings Mandi- 2 are 4 .se-reivecl.` The governor shaft y13-i-svjourmtled in the bearings 11?l and .12 .'The shaft is' driven bythe'pnlleyelthe-pulloy beingxed. gThe spring onthe sho; ibymeansoftghe en -screw :15.

which l .The spool The carrier 16 for the centrifugal goverand are pivotally' The ends ofthe` Weight having the slot 23'into which the on the ext-ension.l

and the slotted ends 43 ,onthe 15 engage these, cra-nk lever. t5 is. pivoted.

extending from, .the trarne 7,2 r extends tlirouglr'thje perforation p i end fi'l, said end being provided with'the circular bearI- engages-the. `spool 48.v l I 48 rests on a collar; 49 yiixedonthe shaft"byr'n'ieanti:y ofthe 50."

51 l is arranged between the `col-f Patented sept. 9,1913.. y

he governor weights should bel y approximately an astatic governor varying con-1,1 neoted to the weights 17 by means of them 1e carrierby the roller 32, operating in i 1 a smaller lar rand'l'thetop offthe I 52 ,may be varied.

sufficient strength to lift the valve when the stem is relieved from ressure from the governor or regulating evices.

The centripetal element of the 'governor comprises the springs 20, and also spring .52 which operate on thev lever 45. The springs 52 are arranged at each side of the sleeve 8, and are secured to the lever 45 by means of the pin 53. The upper ends of the springs are secured to the' yoke 54.

A hollow screw extends through the een? ter of the yoke, .and is mounted on'a pin 56 'extending upwardly from the sleeve 8.- This screw is provided with a handle 5 7v by turning which the tension of the spring The screw is locked in adjustment by )the jam nut 54a. As before stated, this governor is to be arranged to operate approximately as van astatic governor, andthe links 24 are arranged with l relation 'to the `weights and the rotative sleeve so that the leverage through the links will increase vas the weightsv move outwardly. so as'to compensate for the greater force of the weights in their 'outer positions. The diiferent'positions of the pins 26 is indicated bya series of points a, b, c, d, e, f,g, and these points being connected with points similarly lettered indicating corre'- sponding positionsof the .pin 25. These different positions are' carried down to theV radial line and the intersection of the radial line is marked.w1th similar letters, thus 1ndicating the various .increase in leverage as the weightsinove outwardly. Through this link connection operating on the spring 52 and in connection with the s rings 20, a centripetal; element'is provide giving ap proximately the astatic `condition to the governor, the relative strength vof .the

- springs 2O and 52 being varied more fully accomplish this purpose.

The pressure. device is carried by a bracket 58 Vextending ,from the sleeve 8. This bracket .has the perforation 59 into which the end of the inverted cylinder 60 extends, having the shouldei-l for. supportingv the cylinder. The end of the cylinder is screw threaded at- (52 von which the endl63 is arranged for locking it with the bracketf58. i Airfrom the source of supply from the-compressor is connected witlrthe lider 60, landis subjected to the fluid pressure pressure `device through the pipe G4. As shown the'.` pipe being-connected to the disch rge pipe of the. compressor.l l

'he pistonwfi -is arranged in the cylininthe cylinder.. Avpin` 66 has one end 60. against 'the piston, and the Vopposite end of the socket`67 in anadjusting' screw G8. The

adjusting screw is arranged in the end of the lever 69,'and is locked inradjustment by thejam nut 70. p l y The lever 69 is pivoted on the pin-7 1 sccured to the ears 72 extending` on the valve stem 6. When the pressure on the piston exceeds a predetermined mini- -mum it begins to force the lever downwardly and consequently to force the valve stem 6 downwardly against the tension of the spring 51, and this closes off the valve ,3. With the added vloadan increasing tension of the'spring 51 varies the movement of the piston 65 so thatit moves downwardly' as the pressure increases and returns to the position shown in` Fig. 2 as the pressure decreases. The spool 48 is preferably slidingly mounted on the stem to permit of the free downward movement of the stem under the influence of the pressure device.

It is desirable to unload the compressor if the requirements are. such that even with the minimum speed of the compressor through the action of the pressure device there isftoo great an amount of pumped fluid, and it isalso desirable to have this controlled by one pressure device so that its operation with'proper relation to the action o1"l the pressureA device may be assured.

In Fig. 9 we show an elevation of the compresser, one of the inlet valves being in section showing a form of relief device connected according to my invention.

78 marks thefsteam cylinder, 7bL a'steam connection coming: from the valve body l', 78b the compressor cylinder, 7 8or the discharge from the compressor, 79 an intake, and 80 the Ainlet valves.y 80 have the stems 81 which-extend through thespider 82 and guide 83. A shoulder 84 The inlet valves is arranged on the end ofthe stein 81 and a spring 85 is tensioned between the spider 82 and the shoulder 84; The spider 82 is heldin place by the follower 8G which is screwed into the compressor cylinder and this is provided with a cap 87 forming a cylinder 8S. r1`he follower has the cylin- Jdrical bore -89 into which is arranged the piston 90. -The cap 87 has an opening 91 The opposite to whicha pipe 92 extends. end. ofthe, pipe is connected with the side of the r cylinder 60. The opening through the cylinder- 60 being at 605 and in position .to be uncoveredfby the piston 65 wlienfit reaches a predetermined maximum position.

The .operation oi' the apparatus is as follows: Ordlnarily the engine is. under the ,control of the centrifugal governorwhich tends to maintain a uniform' SDBELLQAS the Leraars pressure* rises above the predetermined `.minif ymuni it, acting on the piston 65 actuajtes the lever 69, and it dcpresses the valve stem control-ling the valve. The depression o this stemis more readily accomplished While it yis still under'the influence of the centrifugal .governor because the spring 51 has a centripetal eil'ect on the governor.

y In the initial movements, therefore, undertheaction of the pressure device, the centrifugal governor still-has Vsome control of the valve.

jAszthe pressure device rises, however, the

' piston 65 v *air into the pipe 92 and this passing to the thus vlifts g )so that with the continued operation of the pressure device closes the governor valve 3x tothe point bringing the governordown tot a speed that -it Will'safely run. The mini* mum point at which it can force the valve is' controlled by the screw 76.' Just when" the pressure devicereaches this position, the passes theopening 60a letting the cylinders l88 operates the pistons 90,' and the inlet valves 80 ed their seats comp'res'sor, the air simply moves. from one end of the cylinder Vto theother past the in- :l ,let valves by way of the inlet passage 80". n f `A`'The pressure at which the piston Will'un-.`

cover "the 'portOt niay vbe varied by means ofthe screw 68 which `will varythe initiall positionrof thepiston.

, It is desirableA to retard the release of the air from the cylinder 88l so'that the full load of fthe compressor-will not be thrown on abruptly. lTo accomplish this, I provide a course may he anywhere connectedjwith the cylinder 88'.,` When. the

minute leak 93 inthe pipe 92. This lea-k, of

pressure on the piston 65 reaches a point :where the lever69 will return the piston, the piston' covers the opening'Of; rrThe air in the pipe and cylingradually escapesl through the 'ni'nute opening l9 3, thus allowing the inlet valvesr to close gradually and in the meantime the rovernor valve having been' relieved ofthepressure device and thushaving ellected th'e speeding up of the compresser' so thatvvhen theload finally does go on there is sufli'cient moment-um of the `parts to carry the compressor over the centers.

While I shown preferably inl-use in this connection an unloader or relief-device operating upon the intake valves, 'it will be lunderstood that the device is applicable to any relief device-which unloa s the compressor.

The type ofgovernor herein yshown lends itself toa safety stop kmechanism by means ofwhich when the governor belt is Vthrown offvthe governor valve is immediately closed.v on the upper end lof' the' edge which mesh gear teeth 99 on thevlever 100. The lever 100 is pivoted on the pin 101 extending between ,the ears 102,1 Thev spring 103 is secured yto the perforated ear 104 and the perforated ear 105 on the frame lWand exerts sufficient pressure to pull the lever 100 downwardly and through the gears and lever `96 to force the lug 95 doWn-' f wardlycarrying with it the finger 94 of thel valve stem thus'closing'zthe valve. n Astop 75 v106is arranged on the lever ,whichlcomesf into engagement with the frame to limit its;l movement. .i The end-of the lever 107rides on a flangev 108V on the sleeve 109. -The sleeve 109 is journaled on the bearing. 11.*r An arm 110 extend-s outwardly ,over the sleeve 109l and carries a rider pulleylll" which normally rides on the governor driving belt 112. ,-Nhen'the belt 112 -breaks,the v `rider pulley 111 drops and moves the flange l 85 10Sv from under the end of the lever 100 thus allowing the lever 100 to drop,andin consequence closes the valve as aboveA de-v scribed. j 1 1 The governor shaft 13 isrlocked'. againsty endwise movement at one end by the-carrier 16 abuttingagainst the end `of the bearing 12, and at the opposite end of thccollarla abutting against the bearing 11, the collar 13"1 being fixed on the shaft by a set screw 13?.'

YVhat'I'claini as new is: v l y 1. In a controlling jdevicejfor compressor-54 thecombination of a speed controlling deiI vice controlling the motive fluid; -alrelief device yfor the compressor; a fluid actuated 100 controlling motor acting on said controlling- 'i device; a fluid actuated relief motor acting on the relief devicegand means actuated by the controlling motor for controlling the reliefmotor. f 4

2.A In acontrolling devicefor compressors, the combination ofa speed controlling device controlling the'ilow of motive fluid; a 4valve for the compressor; a relief device for act-ing on the valver of the compressor ;-a fluid 4actu- 110 ated controlling motor acting on saidcon trollingdevice; a fluid actuatedrclief motor acting on the reliei` device; and means actu.- ated bythe controlling motor Vl'or controlling the reliefmotor. y

3. VIn 'a controllingdevice for compressors, s thecombination of a speed controllin de-r- .vice controlling the lowofmotive iluid; a` reliefvdevice for acting on the intake of the los tor acting on said controllingodevce; a fluid actuated relief motor-acting Lon the relief de-y lvicei rand means actuated by thecontrolling motor for controllingfthereliefmotor,

'the combination of a valve controlling lthe iiow ofmotive'fluid; a centrifugal governor fjacting on ythe valve', acontrcllin'g .motor act-f lingfIljtlie valve arelief rl'evice for ,thei com,-

compressor; a fluid'actuatedcontrolling mo- 12o 4;; Ina controlling. device for compressors, 1.25

.,presser; @liet-meter fer etuatingthe reist:

lief device; and-.meansuactuated by the con-K- trolling motor for controlling thel relief motor. A. *i

5. In a controllingdevic'e for compressors,

i the combination of a 'valve controliing the flow of `motive fluid; a centrifugal governor" l acting on the valve; a controllin motor act,-v ing on the valve independentfof t e centrifugal-r governor; a relief ldevice .for the -cornpressors; a relief motor'for actuating thereliefdevice;1and means-actuated by the controlling motor for controlling the relief` motor. l y

vG. 'In acontrolling 'device for compressors,

the combination of a speed controllin device controlling the motive Huid; a relie device vfor the compressor; a-fiuid actuatedV control-- `ling motor acting on said lcontrolling device;

ling motor for controlling the relief motor, said relief motor having a retardedfrelease n.for motive fluidv for ret-arding the act-ion of therelief device until after the controllingy motor has actuated'the speed controlling device to increase the speed of thecompressor. 7.- In acontrolling device for compreseors, thefcombination of a speed' controllingdeo vice; a controlling motor vacting onv said*` 3U speed controlling device, comprisingfa'cylinder and piston; a relief device for the coinpresser; a relief motor for actuating the 'ref .lief device; and a connection` betweenthe cylinder and the relief motor, saidconnection'being opened and closedby the move'f mentiofthe piston.' Y y j "i 8. In acontrollin'g device vfor compressors,

t-liecombination vofa speed controlling device;" a controlling `motor actingr'on said 40 speed controlling device, comprisinga cylin?` der piston; a relief device for the coin-y pressor; a relief motor for actuating the re-y lief device; a connection between the cylin-f vice; a controlling motor lcomprising a cyl? Inder and piston; a connectioiifbetween the y controlling motor and tliespeed'controlling x device; means for adjusting said connection to vary` the travel of thejpiston; a relief i device forv the compressor; a reliefmotor 'forfsaid relief device; a connection .between the relief motor and the cylinder, thetr'av'el e of the piston controlling'said connectie-irland theadjustment ofthe .piston varying tlieA 30 point; at which coimectionis openedfand-v closed. g Y

1,0. In a'controllmg device 'for compressors, ithe. combination of/.ra speed controlling 4`deyiceyaicontrolling 'motor comprising a cyl` inder; a piston 1n "the cylinder, and a cona fluid actuated relief motor acting on`tl1ev relief device; means actuated by the control-- l trolling motor.

nection between the piston and the speed controlling device;:a relief device and rellef ,motor forv actuating ythe relief. device; and :a -f connection between therelief motor andthe cylinder, said connectionfopeningm the cyl-` inder, vSaid opening ybeing uncovered and closed bythe movement of'tlie'lpiston-y *y n t 11; In a controlling 'device for compressors, A the combination'of a speedcontrolling de-r vice; a controlling v*motor comprising ay cyl,-v inder; afpiston in the cylinder; al connection y between the pistonandthe speed controlling device; afrelief device; arelief'motorfor actuating the reliefdevice; a connection be` tween lthe. relief' motor and the' cylinder, 80 said connection opening in the cylinder, said? openingv being uncovered .and closed bythey t movement of the'piston; and means-for adjusting thepositionof the pistonto vary the point in its travel when the opening is uncovered..` y. I Y i M 12. vIn a controlling device for. compressors, the combination of a` valve;a centrifugal governor actuating the valve; a controlling j.

motor; a connection between the controlling 'motor vand the valvef'a relieffdevice;.a relief motor for'ftlie reliefdev-ce; and meansv controlled by the controlling motor forcontrolling the'reliefV motor. y ,13. In a controlling devine for compressors, 95 the combination ofa valve; a centrifugal governor acting on the valve, comprisin ythe 'centrifuga-l and `centripetal elements ofthe governor; a controlling, motor; aA connection y betweenA the controlling motorvandv the valve` ,x independent'of thecentrifugal governor elements; a relief. device; a relief motorfor 'the relief device; and means controlled by the controlling motor for controlling fthe relief motonfy 1 y A i105 1,4'. In a controlling device forcompressors;

the combination ofl a speed controllingde-t y n vice;. a fluid actuated. controlling motor actuating the speed controlling.device.;al

relief device for thecompres'sor; arelefjlo motor acting onthe relief device; and means 1 controlled bythe controlling motoriforactu.- i

ating thefrelief motor onlyat a desi-red rnin.-` `l muin pressure Of,Pumpediiuid-y o l'ltlieconeV4 `3.15 115. 4Ina con trolling ldg'e-viceffor compressors, i

the combination of a speed controllingde-v vice; a fluidiy `actuated controllingmotor actuating saidf speedy controlling y, device; aj n q relief device foritheflcompressor;. a. fluid 5120 actuatedr yreliefl motorY for actuating the re- 1 y, Y

liefodevice;and a connection :betweenthey "relief 'motorjand the controlling motor, ksaidf,- Y

connection being -openedl-toje'ctuatethe re-v4 lief motor onlywheli' the controlling. motor-125 actuates the speedcontrollingdevice toeifect a desired minimum 'speedfof a compressor,"

ycontrolled bythe speedi'controlling, device@ f 1G. Ina controlling device for compressors, 1" the combination of@ ,speed-controlling,dejl 13o vice; a, fluid actuated controlling ihotor l:Lcuating said speed controlling device; a relief device For the compressor; a fluid ctuated relief motor for actuating' t-lie re- 5 lief device; n connection between -flie relief motor and Jche controlling motor, said connection being opened to act'uate the relief c motor only when the controlling Inotoi' actumeans for adjusting the controlling motor to vary the minimum speed of a compressor controlled by the speed controlling device.

In testimony whereof I have hereunto set' l5 my. hand in the presence of two Subscribing Witnesses.

RUDOLPH CGNRAD'ER.

ates the Speed' controlling device to effect a `l/Vitnesses:

10 desired minimum speed of a compressor controlled bv the speed control1ing leviee; and.

BLANCHE HARTMAN, 

